package main 
import "fmt"

type Human struct { 
	name string
	age int
	phone string 
}

type Student struct { 
	Human //匿名字段
	school string 
}

type Employee struct { 
	Human //匿名字段 
	company string
}

//在human上面定义了一个method
func (h *Human) SayHi(){
	fmt.Printf("Hi, I am %s you can call me on %s\n", h.name, h.phone) 
}

//Employee的method重写Human的method 
func (e *Employee) SayHi() {
	fmt.Printf("Hi, I am %s, I work at %s. Call me on %s\n", e.name, e.company, e.phone) //Yes you can split into 2 lines here.
}

func main() {
	mark := Student{Human{"Mark", 25, "222-222-YYYY"}, "MIT"}
	sam := Employee{Human{"Sam", 45, "111-888-XXXX"}, "Golang Inc"}
	mark.SayHi()
	sam.SayHi()
}